Demonstration device



May 8, 1928. 1,668,844

y F.,A. G REls DEMONSTRATI ON DEVICE Filed May 22 1924 4 Sheets-Sheet 16,@

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May 8, 192s. y

F. A, GREls DEMONSTRATI ON DEVICE Filed May 22 1924 4 Sheets-Sheet 222228222 555.54 55555 .3333333.33 4444444 a n nn aan n u u w 55 TOTALSSnom 1 hn) ,lu/@ (if elif.

aucune Patented May s, 192s.

UNITED. STATES PATENT e OFFICE.- e

:Banamex .L cams, OFNEW YORK, N." Y., ASSIGNOR `'ro nLmOTT-FIsnnncomuni,

. "A CORPORATION OF DELAWARE.

DEMONSTRTION DEVICE.

. Appncation inea my 22, 1324. serial No. 715,135.

This invention relates to a demonstration device designed to facilitatean explanation of a system `of accounting and a theory `of operation ofan accounting machine.

The object of the-invention is to .produce a simple, effective andinexpensive device by means of which, the salesman of a machine, as forinstance, a. bookkeeping machine, may read-il `demonstrate to a customerthe system o bookkeepingor. accounting for which the machine isintended; the

purpose and character of the records secured bythe operation of themachine as Well as the computations effected by the machine, and

the checks, proofs and other safety features which are incidental to theoperation. i

To the accomplishment of `this generalobject and others subordinatethereto, one embodiment of the invention residesV in the constructionand arrangement of parts .to

be hereinafter fullydescribed, illustrated in the accompanyingdrawingsandidefined in the appended claims. t

In said drawings:

Fig. lis a front elevationof the demonstration device as it appears uponthe com-` pletion ofthe entry of a transaction, the blindbeing showniii-dotted lines in the position it assumes tokdisclosc the normallyobscured Or covered sight openings.

Fig. 2 is a view ot' the slide showing the arrangement ofthe datathereon.

Figure 3 is fa transverse section. Figures 4to-12 inclusive, arediagrammatic viewsindicating the data appearing on ,the Work sheets andon the .registers at each step of the demonstration.

Mechanically, `the .device is very simple consisting primarily of asheath or case il and a slide 2` therein, theslide being Apro.- vided:with a handle 3 to facilitate itsmanipulation. The sheath l may be madeof any suitable material, preferably composed `.of frontend `back boards4 and 5 interposed marginal spacing strips 6, a celluloid orY other`inexpensive transparent cover 7,` and eyelets 8 disposed along the topand side margins of the device and passing through thecover, front andback boards and spacing strips lto unite these severahelements in yapermanent sheath or case with sutiicient space between the `front andback boards thereof and between the side spacingstrips to Venable theguide 2 to be actuatedand guided. i s

ance, Name and Proof .Displayed on the front board of the device arepictorial representations `of an ac-'` counting `,machine 9, and Vtheequipment of computing devicesor registers employed on the machine forthe particular class of Work to he demonstrated. The registersillustrated in the present case arethe Old balance register 1l0, theCharge77 registerll, tl1eCredit register l2, the New balance register13, the Proof register 14 and the Cross footer register 15. i

`In their mechanical embodimentthese registers are provided with sightopenings through which the computations thereof are indicated 4ordisplayed, and the demonstration device is likewise provided withcorresponding sight openings 16 in the front board 4 through which dataprinted on the slide 2 `may be exhibited `in imitation ofthe. actualregister indications. Also pictured on the Vfront of the device `are theseveral Work sheets utilized inthe demonstratedsystem of bookkeeping oraccounting. `These sheets are not directly superposed so that a recordlmade on one would be transferred" to the others, butare shown in anapproxi- 4mate?relation from which their-actual relation' may be readilyunderstood. lIn the presentinstance, these .work Vsheets are .theMonthly statement 17, the Customers ledger 18and the Sales journal 19`shown intheir actual vertical or columnar alignment Ahut oifsetitoexhibit the irst Writing line of each sheet.` Along each of theseVWriting lines the front board of the device is formed Vwith sightopenings 20, 21 and 2Q oppositel each of the columns through iwhich datamay be exhibited from the slide, in imitation `of `the data which wouldin practice be printedon the sheets,.either directly or by transfer.kThese columnsbear the designations Old balance, Number, Date,Description, Charges, Credits, .Bal-

`Usually the proof and name columns are omitted from the monthlystatement andthe proof column from the customersledcer also, so that thename appearsonly Aon tlie customerls ledger andljournal. andthe proofappears `on `the journal only. r i.

NOW then, the purpose of the demonstration device is to showprogressively, exactly what is indicatedfon Athe several Work sheets andon the registersby the writing of an item in any column; "It istherefore, only sus` bear such indications at that particular step ofthe actual operation of the machine. For instance, assuming the slide tobe drawn out so that no indications thereon would appear at any sightopening, the slide is pushed in until the amount h35, for instance,appears in the Old balance column. This represents the first entry whichis known as bringing down the old balance. The number $4.35 is carriedfor this position of the slide in five different places on the slide sothat the amount $4.35 will be displayed in the Old balance column ofeach worl; sheet and also in the Old balance registers 10 and in thecross footer 15. This is for the reason that in the operation of themachine the mere printing ofthe amount of the old balance in the oldbalance column of the monthly statement causes the same item to appearby transfer on the customers ledger and sales journal and operates boththe old column register and the cross footer to register the sameamount. These five indications of the old balance as they occur on thedemonstration device will be seen by reference to Figure 4, the sightopenings in this diagrammatic view corresponding in lateral, though notvertical, spacing with the sight openings in the front board of thedevice.

The next operation is the insertion of the number in the number column.The slide is therefore moved up one step and irrimediately the number 2is displayed in the number column of the three work sheets while thenumber displayed in the old balance column and in the two registers isthe same as before, because in practice the entry of the number ismerely additional to what in no way affects the old balance entries landregistrations of the preceding operation.

Next, the slide is advanced another step because the next operation is`the entry of the date. January 3 immediately appears in the datecolumns of the sheets, but the indications advanced into view in the oldbalance and number columns are still the same and the registers areunchanged as in practice.. The next entry is the description of themerchandise. Once more the slide is moved up and the descriptive matteris shown as if Written in; mdse. being utilized in the device as ageneric description. Likewise in this case, the indications advanced tothe sight openings at the left are duplications of those displaced,because the entries in the three columns appropriated to number, dateand description have no effect on the registers.

We now come to a charge entry and as the charge indication comes intoview by the movement of the slide we find that while the amount in theold balance register remains the same, the amount of $2.20 appears inthe charge register while the amount in the cross footer has changed to$6.55 which is the sum of the old balance plus the charge. We now havethe old balance in the old balance register', the charge in the chargeregister and the sum of these two amounts indicated in the cross footer.The next entry is the entry of the amount of the new balance, whichamount is ascertained by reading the cross footer and is then Written inthe .new balance column. In practice, the printing of this amount atthis point automatically effects a corresponding adding operation of thenew balance register 14. and a corresponding reverse or subtractingoperation of the cross footer. ,Therefore the writing in of the newbalance, if correctly done, must clear the cross footer to zero and theproper copying of the new balance is thereforel proven by the crossfooter which, if cleared is positive assurance that the new balance hasbeen correctly written and that the amount shown on the new balanceregister is correct.

The next movement of the slide affects nothing except the addition ofthe name J. Jones on the Sales journal and Customers ledger, all of theindications at the various other sight openings being duplicated by thisVlast movement of the slide.

The next operation is the printing of the old balance in the proofcolumn which causes its registration in the proof register 14, afterwhich the operation is completed by setting the machine for subtractionand rewriting the amounts in the old balance, charge, new balance andproof columns which will accomplish the clearing of all registers. Inorder that the subtracting operation may be kept entirely distinct fromthe series of steps of a straight operation and for the further lll)reason that this subtracting operation is Y effected after the removalof the customers ledger and monthly statement, a separate line of sightopenings 23 for the display of the distinctively printed numbers used insubtraction is provided in the picturization of the sales journaljustbelow the openings 22 and is normally covered by a swinging blind Q4pivoted at one end, as indicated at 25, and having its opposite endextended from beneath the cover so that vit may be readily swung down touncover andexpose the openings 23 before the slide is moved up todemonstrate the subtracting operation.

It will be noted that the vertical ruling of the columns is extendedacrossthe blind and that the circles representing openings in the salesjournal are also reproduced on the blind and that the lines indicatingthe edges Lacasse" oflthe sales journal and of the memberl 7 .are

affected by successive machine operations,`

andthe other of said members provided With characters so arrangedthereon that as the relatively movable members assume different relativepositions, said characters will be disl played at the (sight openings toindicate the results of successive operations of the machine.V y i 2. Adevice for demonstratingthe opera` tion of a machine, including a`plurality, of relatively movable members provided with a pictuiization`of the machine, indicating characters, and sight openings so arrangedrelative to each other that in successive relative positions of saidmembers the results of successive operations of the vmachine will bedisplayed at the sight o-peniiigs. l

3. `A device. for demonstrating the operation of a niachine,includingaplurality of relatively movable members .provided with a picturizationof the lmachine, indicati'ng`- cha acters and sight-openings, soarranged relative to each other'that in successive relative. positionsof said members the result of l successive operationsof the-machineivill be i. displayed at the sight openings, andl amovable"blind"covering certain sight openings, butn'iovable therefrom to-facilitate the dem-` onstration of a particular kind of machine" yopera-tion. t

4. A device ,for demonstrating the operation of a recording andcomputingfmachine which consists of relatively movable meinbers, one ofwhich isI provided with a" reprey sentation Vof 'the machine,representations of the Work elements or sheets and sightopeningsvcorresponding nin location With the record recorded on thesheets and With the registration indicated 011 the machine, and theother element being provided with characters so arranged thereon that asthe relatively movable members assume successively different relativepositions said characters will be displayed at the sight openings indemonstration of the recording and register-` ing results of thesuccessive operations of the machine.

5. A demonstration device including tivo` relatively movable members,one having a series of sight openings for the display ofv charactersillustrative of the recording operations on a machine, ^and anotherseries of vopenings -for the display of characters illustrative oftheregistrations or indications of the addingV devices or registers of themachine, the other of said members being provided with the characters tobe displayed at the sight. openings, said characters being so located onthe second member that in successive positions thereof the characterspresented at the sight openings will be illustrative of successiverecording andcomputing operations of the machine.

6. A demonstration device including a member bearing a picturization ofa recording computing machine capable of recording in various columnsand having a series of registers capableof various computing operations,said member a'lso having displayed thereon a picturization ofoiie ormore ivork sheets with appropriate columns anddesignations, and saidmember also having sight openings in the picturization of theqiegisters`and inthe columns of the ivork sheet or sheets, anda second membermovable relative to the member first named and having characters solocated thereon that in successive positions of saidsecondinemberthecharacters will be displayed at those sight openings ofthe first member which correspond with the record made andthecomputations" effected `by successive operatioiisof the ina` chinepicturized.

7. A device for demonstrating the operation o'f an adding andtypingmachine, `coin` prising asheet' on which a pearsthe representation oftheadding an typing machine,

,the `operation ofivhichis to be demonstrated, the sheet on which therepresentation appears having sight openings therein, one opening beinglocated inthe irintiug zone on said representation to disc ose' thenumber supy posed vto be typed, and another 'opening in said sheet atthe'counter cover represented in the said representation, and a slidemovable back of said openings in the representation of the adding andtyping machine, said slide having thereon `predetermined demonstrationiigures cooperative with the sight openings y to Vshow the changes inthetypiiws and the corresponding parts `that should appearin counters ofthe machine.

8. A device for demonstrating the operation of an adding and typingmachine comprising a sheet having thereon a representation of themachine, the demonstration of Which is to be made, said sheet havingsight openingsvtherein in that part of the representation illustratingthe changes in the typing of the machine and also in that part of therepresentation of the machine illustrating the counter covers, and aslide with numbers cooperating with the first mentioned opening torepresent the typings dur.- ingkan operation of the machine, and figureson the slide opposite the other opening to represent the correspondingchanges in the adding mechanism of the machine.

9. A device for demonstrating the operation of a typewriting andcomputing machine coinprising a frame forming a chart having thereon arepresentation of the typewriting and computing machine, thedemonstration of which is to be made, apertures being cut through saidchart in locations representing the typing zones and counter zones toexpose the resultsvof typing and com Vuting operations, and a slideinserted within suitable guides, for exl'iibitingr entries and corresponding numbers, in position to` register with said apertures atsuccessive steps or stages of adjustment.

10. A device for demonstrating the op-V eration of a typing andcomputing machine comprising a card or panel with an illus tration of acomputing machine on the face thereof, a slide attached thereto, andlugs on said slide engaging stops located on said card or panel andlimiting the movement thereof, apertures being cut through said panel inthat part of said illustration representing the printing zone andregister zone to expose entries appearing on said slide.

11. A device for demonstrating the operation of a typing and computingmachine, a card or panel with an illustration of a computing machine onthe face thereof, a slide attachedthereto, lugs on opposite sides ofsaid slide engaging stops located onsaid card or panel and limiting themovement thereof, apertures being cut through said panel to exposeentries appearing on said slide, meansy to grasp the slide for manualadjustment, and other means to retain the panel or card in position fordemonstration.

1Q. A demonstrating device for a bookkeeping machine including a framehaving a lower layer and an upper layer, the latter bearing a picture ofsaid machine on it-s face and having sight-openings at the platen,register and indicator velements of said machine-picture, and a slidedisposed between said layers, said slide having thereon charactersrepresenting entries on a ledger-sheet, numerals representingregister-figures, and letters representing letter-bearing members in anactual machine arranged for indicating thenature-of certam operations ofsaid machine, said characters being arranged to f appear in the platen,register and indicator tries on a ledger sheet and numerals that`represent results shown in the registers of said machine when saidentries are run into the machine, and indicator-characters thatrepresent automatic indicating means provided in said machine to informthe operator thereof what kind of register-computing operation themachine is set to perform.

14. A slide for a device for ldemonstrating a bookkeeping machine, saiddevice being provided with a picture of said machine on its Vface andplaten and registerjsight-openings, said slide including a platearranged forvhaving typedthereon groups of demonstration letters andnumerals representing entries on a ledger-sheet to be exposedat saidplaten sight-openings, and Vgroups of demonstration numeralsrepresenting figures of registers to be exposed at said registersightopenings, and means for readily locating said registerlgroups ofnumerals in proper positions on said plate, said means including a markfor locating the first line of characters to be exposed at said platensight-openings, and a column on said plate positioned to moveco-operatively under each of said register sight-openings uponmanipulation of said slide, said columns being divided into rectangularblocks, each of said blocks being positioned below a line of the entrycharacters a distance equal to the dist-ance between said platen andregister sight-openings, said groups of entry characters being spacedone or more full typewriter line-space intervals above the nextv lowergroups. I

In testimony whereof I hereunto affix my signature.

FREDERICK A. GREIS.

